. Fig. 24. Physiculus marginatus. x f. A Synopsis of the Species of Physiculus I have been led to examine all the specimens of this genus in the British Museum collection, but, as several species are not represented, it has proved impossible to draw up a satisfactory key for their identification. Provisional key to the species I. Barbel present. A. Second dorsal with 42 to 48 rays; anal with 40 to 53 rays; body stout, the depth 3! to 4^ in the length ... ... ... ... ... ... ... ... backus, barbatus. B. Second dorsal with 49 to 73 rays; anal with 54 to 74 rays; body usually more slender, the de
. Fig. 24. Physiculus marginatus. x f. A Synopsis of the Species of Physiculus I have been led to examine all the specimens of this genus in the British Museum collection, but, as several species are not represented, it has proved impossible to draw up a satisfactory key for their identification. Provisional key to the species I. Barbel present. A. Second dorsal with 42 to 48 rays; anal with 40 to 53 rays; body stout, the depth 3! to 4^ in the length ... ... ... ... ... ... ... ... backus, barbatus. B. Second dorsal with 49 to 73 rays; anal with 54 to 74 rays; body usually more slender, the depth 4! to 6 in the length. 1. 15 to 20 gill-rakers on lower part of anterior arch. a. Eye z\ to 2§ in head; about 13 scales in an oblique series from first dorsal to lateral line; median fins with dark margins ... ... ... ... ... marginatus. b. Eye 3! in head; about 7 scales in an oblique series from first dorsal to lateral line ... ... ... ... ... ... ... ... ... ... rastrelliger. 2. 7 to 14 gill-rakers (including rudiments) on lower part of anterior arch. a. Eye 3 in head, which is 45 to 4! in length of body; maxillary to below posterior margin of ... ... ... ... ... ... ... ... capensis. b. Eye 3^ to 5 in head, which is 3! to 4! in length of body. (i) Maxillary to below posterior part of eye or beyond. a. Eye 3\ in head; pelvics much shorter than head ... ... ... fulvus. /3. Eye 3§ to 3! in head; pelvics longer than head ... ... ... nematopus. y. Eye \\ to 5 in head; pelvics a little shorter than head argyropastus, nigrescens, grinnelli.
Size: 3771px × 1325px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
